Malicious PDF — malware analysis report

Static analysis result for SHA-256 128e68d068e7167f…

MALICIOUS

PDF

45.7 KB Created: 2020-08-24 04:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d15ef9ba789eb7c8ded20515020a9922 SHA-1: 81f360e47b300767df24c8dd44cc7815f31a3a8d SHA-256: 128e68d068e7167f911a9f7635753d7354e2f7c837227fd2a732957c8cc6baa1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link to a known malicious redirector, suggesting an attempt to lead the user to a malicious site. The document body, though heavily obfuscated, contains URLs that are part of a link farm, indicating a potential SEO poisoning or spamming tactic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to exploit users.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=command+prompt+codes+for+hacking+pdf
    • http://zajiwo.capturedbyecp.com/uploads/1/3/1/4/131437508/4570793.pdf
    • http://files.sanchezartgallery.com/uploads/1/3/1/4/131409794/9239271.pdf
    • http://files.medicinewheelrecovery.org/uploads/1/3/0/8/130814343/najuvavob.pdf
    • http://xoxojomiv.rvadventuretreks.com/uploads/1/3/2/3/132303382/fipenadoteg_vedajexenigegun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/7730/2427/files/redisa.pdf
    • https://cdn.shopify.com/s/files/1/0439/8533/8526/files/wlhr_92._1_swap_shop.pdf
    • https://cdn.shopify.com/s/files/1/0435/5699/5233/files/goduwupenekufizipadef.pdf
    • https://cdn.shopify.com/s/files/1/0432/6414/7609/files/3d_photoshop_cs6_software.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/62192406694.pdf
    • https://cdn.shopify.com/s/files/1/0434/7595/9973/files/basic_automobile_engineering_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0430/5934/7618/files/states_of_matter_simulation_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/79537854761.pdf
    • https://cdn.shopify.com/s/files/1/0430/3775/3501/files/8255964920.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061ab.bin
8ef1c28ed84c978e80e02be2f1636a297b8da9d1eb61c9c9d8f8dc09a8b2d8a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61AB 5412 bytes
font_01_sfnt_off000073db.bin
beaaf779442678e44ba629ae4cd4579c79295091a79f1a7c7681cd29a270a8e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73DB 12588 bytes
font_02_sfnt_off00009c40.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C40 4324 bytes

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